What could this burn be

[Sequelizbe]

Good luck with your plants! Hope everything will be great!

[Demeter]

By now they should have their roots in the water and be big enough to be getting more than 540..

In my last DWC run, the girls were getting 12-1300ppm by week 3-4 and had quite the growth, it is all genetics and they're all different but almost any strain would have quite the appetite by week 4.

What nutrients are you using and at what rates?

Burn and deficiency can be identical and at this far into growth I can't fathom how she was burnt with 540ppm

[Bobb11]

http://images.tapatalk-cdn.com/15/11/25/299d164b3ff59d213fb7f667d25f48d6.jpg

 

I have put 20ml of each and use 60ml of grow in 80 lt

Use hydrochloric acid for PH control

I have a new air pump as there was not much air in the pots http://images.tapatalk-cdn.com/15/11/25/d016ffeaa3b49422cd867f4a230e36e0.jpg

 

http://images.tapatalk-cdn.com/15/11/25/235fd0c2005c9b3fcbde9d99029f07e0.jpghttp://images.tapatalk-cdn.com/15/11/25/9c96fa089e14820320179cf5d9a5ff17.jpg

I think it's over dosed as I cleaned it all out and started the res again with ph water for 24 hr

There is some green starting to happen on top now instead of yellow

[Demeter]

Woah, ok when you use the HCI(acid) is that straight from the bottle or are you diluting it first then using the diluted mix for ph down?

The latter is the way to go[emoji106]

(I do not recommend HCI as a ph solution though, just giving advice on your intended route)

 

I suggest giving them the recommended dose for their age(may have to google a DM feeding chart) of Grow only and see how they go, I haven't used DM nutes except for add.27(good stuff[emoji106]) but I never had an issue with it.

 

I have a similar air pump and it's awesome! Good choice[emoji16]

The green is a good sign indeed

[Demeter]

This should help aid future issues

http://images.tapatalk-cdn.com/15/11/26/e55bc131943610a8b29edf8525c137a5.jpg

Had it for ages, it helped me learn what to look for and what to do to correct micro deficiencies, may as well pass it round I'm sure we all need a chart like this[emoji108]

[Bobb11]

I use it strait from the bottle what should I be using for ph down

Defiantly will look up feed chart

And thanks for the chart [emoji106]

[Demeter]

That may be the problem, undiluted HCI is very strong and contains Chloride(chlorine and plants are bad juju) ontop of that, too strong an acid dose(ie not diluted enough) can precipitate nutrient salts out of the water leading to nutrient lock-out(possibly the case here)

 

H3PO4(phosphoric acid) is the best to use as it has very little to no ill effects on plants and is what's used in hydroponic PH solutions.

If you can get it undiluted(%85+) it would be cheaper in the long run as you can make many batches with it.(never use any acid undiluted or diluted less than 1:2)

Dilute at a 1:6-1:8 acid to RO/Distilled water, keep it stored in a cool place out of direct light in a black bottle if you have one.

1L will last some time.

Remember to add you nutrients to your res first as they will bring the PH down some, then wait a few minutes before you test and PH down.

Most nutes will bring your PH down by 1 or so, my tap water is 7.5-8 and after adding nutes my res is 6.2-6.5, then I use about 1ml of PH down(premixed hydroponic stuff, it's about 15% H3PO4) to get to 5.6-5.8

 

All good mate, hope the girls bounce back nicely[emoji106]

[Bobb11]

Thank you so much for the info it makes a lot of cense about lockout I think I need to do some more research on this. I think I can get some phosphoric acid at 85% I will try this once again thank you